Cave 9 was cut into the eastern edge of the western section at Tianlongshan in the Tang dynasty. It consists of a huge niche with two levels. The upper level is set back and has a massive colossal Maitreya Buddha image more than 7.5 meters high, seated with his back against the cliff and his head reaching nearly to the cliff top. The lower level has three large bodhisattvas carved in the round, a central standing eleven-headed Avalokitesvara (Guanyin) and two seated bodhisattvas at the sides, each riding on an animal. The Guanyin figure stands 5.5 meters high. Its head is a modern replacement for the original one. The bodhisattva on the east side, mounted on an elephant, is Samantabhadra (Puxian), and the one on the west side, sitting on a lion, is Manjusri (Wenshu).
The large group of carvings is protected by a tall wooden structure that was reconstructed in recent times. The original building, beleived to be from the Tang, was repaired in the tenth century, as recorded on the stele dated 975 preserved at the site.